Size effect of axial compressive bearing capacity of high-strength concrete filled high-strength square steel tubular short columns

被引：9

作者：

Yang, Zhijian ^{[1
]}

Liu, Mo ^{[1
]}

Sun, Lisuo ^{[1
]}

Shen, Minghao ^{[1
]}

机构：

[1] Shenyang Jianzhu Univ, Sch Civil Engn, Shenyang 110168, Peoples R China

来源：

STRUCTURES | 2024年 / 60卷

基金：

中国国家自然科学基金;

关键词：

Concrete -filled steel tube; High -strength materials; Axial compressive bearing capacity; Size effect; Multi -scale simulation; BEHAVIOR; FRACTURE; FAILURE; DAMAGE;

D O I：

10.1016/j.istruc.2024.105978

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The existing research on the size effect of concrete filled steel tubular short columns under axial compression are mostly focused on circular sections and ordinary-strength members, while the study on size effect of highstrength concrete filled high-strength square steel tubular short columns is relatively limited. In this paper, a multi-scale modelling method was proposed in order to study the size effect of axial compressive capacity of high-strength concrete filled high-strength square steel tubular short columns. On the basis of the multi-scale modelling method well verified, a total of 24 multi-scale model were established. The failure mechanism and the influence of different parameters on the size effect of the axial compressive performance were analyzed. The simulation results indicate that high-strength concrete filled high-strength square steel tubular short columns have more obvious size effect than the ordinary-strength concrete filled steel tubular short columns on the axial compressive capacity. Calculation results of equations for axial compressive capacity from Chinese professor Han Linhai, GB 50936-2014 code, AIJ 2008 code and T/CECS 987-2021 specification were compared with the simulation results. The ratio of calculation results of 4 kinds of equations over the simulation results all tend to increase with the increase of member size. Furthermore, 4 size effect coefficient equations were proposed and effectively modified the 4 kinds of equations selected.

引用

页数：14

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